The Berkshire Compact Non-folding Wood Window Crib Exquisitely arched end panels add elegance and charm to a day care center, and provide a cozy sleep environment for little ones during nap time. Clear acrylic panels at each end of the crib allow a caretaker to watch little ones while they sleep or play in the cozy wooden window crib. Both side rails are fixed to create a sturdy crib. Meets the Mandatory CPSC 16 CFR 1220 regulations for non-full size cribs and is JPMA Certified. Meets ASTM 2710 commercial crib regulations required for the rigors of a day care or other commercial environment. Three position adjustable mattress height. Heavy duty ball bearing casters, two of which lock, are attached to the legs by a Chicago bolt system through the leg post instead of the leg bottom. This is not only a stronger system but also eliminates the danger of exposed bolt threads. Includes a deluxe 24" x 38" x 3” thick foam mattress. Add strength and sturdiness to the 560 crib for a fire drill situation with the additional purchase of WC-504-EVA evacuation frame. Bilingual instructions in English and Spanish.